rodan,
"because we think we know best".
Well, over the few short years I have been reading these discussions, there have been a fair few positive comments from our customers, (er, sorry, aircrew), about the quality of the U.K. ATC service.
So we must be doing something right.
Surely, "best practice" deserves to be "rolled out" across the World.
"Global Leader"? - Not Arff!